/*
 * Copyright 2017 Huawei Technologies Co., Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.servicecomb.core.definition;

import java.util.Collection;

import org.springframework.stereotype.Component;

import io.servicecomb.foundation.common.RegisterManager;

/**
 * key为microserviceName(app内部)或者appId:microserviceName(跨app)
 */
@Component
public class MicroserviceMetaManager extends RegisterManager<String, MicroserviceMeta> {
    private static final String MICROSERVICE_SCHEMA_MGR = "microservice meta manager";

    private final Object lock = new Object();

    public MicroserviceMetaManager() {
        super(MICROSERVICE_SCHEMA_MGR);
    }

    public SchemaMeta ensureFindSchemaMeta(String microserviceName, String schemaId) {
        MicroserviceMeta microserviceMeta = ensureFindValue(microserviceName);
        return microserviceMeta.ensureFindSchemaMeta(schemaId);
    }

    public Collection<SchemaMeta> getAllSchemaMeta(String microserviceName) {
        MicroserviceMeta microserviceMeta = ensureFindValue(microserviceName);
        return microserviceMeta.getSchemaMetas();
    }

    public MicroserviceMeta getOrCreateMicroserviceMeta(String microserviceName) {
        MicroserviceMeta microserviceMeta = findValue(microserviceName);
        if (microserviceMeta == null) {
            synchronized (lock) {
                microserviceMeta = findValue(microserviceName);
                if (microserviceMeta == null) {
                    microserviceMeta = new MicroserviceMeta(microserviceName);
                    register(microserviceName, microserviceMeta);
                    if (!microserviceName.equals(microserviceMeta.getShortName())) {
                        register(microserviceMeta.getShortName(), microserviceMeta);
                    }
                }
            }
        }

        return microserviceMeta;
    }
}
